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Lock Acquisition Scheme For The Advanced LIGO Optical configuration

Miyakawa, Osamu and Ward, Robert and Adhikari, Rana X. and Abbott, Benjamin and Bork, Rolf and Busby, Daniel and Evans, Matthew and Grote, Hartmut and Heefner, Jay and Ivanov, Alexander and Kawamura, Seiji and Kawazoe, Fumiko and Sakata, Shihori and Smith, Michael and Taylor, Robert and Varvella, Monica and Vass, Stephen and Weinstein, Alan J. (2006) Lock Acquisition Scheme For The Advanced LIGO Optical configuration. Journal of Physics: Conference Series, 32 (1). pp. 265-269. ISSN 1742-6596.

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The lock acquisition scheme for the Advanced LIGO optical configuration, which makes use of "resonant sideband extraction", is under investigation in the 40 meter prototype interferometer at Caltech. The 40m has a similar optical configuration to the one planned for Advanced LIGO which has 5 degrees of freedom for length control. So far we have succeeded in locking the 5 degrees of freedom routinely. The differential mode of arm cavities was locked in the same state as the final setup, and the peak of optical resonance was verified to be around 4 kHz. Currently, since an offset remains in the common mode of the arm cavities, another optical resonance can be seen in common mode optical gain.

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Adhikari, Rana X.0000-0002-5731-5076
Smith, Michael0000-0002-3321-1432
Weinstein, Alan J.0000-0002-0928-6784
Additional Information:© IOP Publishing Limited 2006. Proceedings of the Sixth Edoardo Amaldi Conference on Gravitational Waves, 20–24 June 2005, Bankoku Shinryoukan, Okinawa, Japan This work is supported by the National Science Foundation cooperative agreement PHY0107417. This document has been assigned LIGO Laboratory document number LIGO-P060004-00-R. We thank the many members of the LIGO Laboratory, the LIGO Scientific Collaboration, the engineering team and many valuable visitors to the 40 meter lab. We also thank A. Freise for developing the FINESSE simulation tool.
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Deposited On:17 Apr 2006
Last Modified:09 Mar 2020 13:19

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